4. VIDEO SOUNDER OPERATION

4.5Measuring Depth, Time

The VRM measures the depth and the cross-hair cursor, time..

1.Rotate the [ENTER] knob to shift the VRM; counterclockwise to shift it downward, clockwise to shift it upward. You may also use the trackball to shift the VRM.

2.Roll the trackball horizontally to adjust the time cursor to measure time.

Time for a scan line to travel from the right edge of the display to the cross-hair cursor

Depth to VRM

0'33"

0 -

VRM

28.8

-

 

Cross-hair

-

 

cursor

-

 

 

50 -

 

 

-

 

 

-

 

 

-

 

87

100 -

 

50k

-

 

 

 

How to measure depth and time

Note: If, when the range setting is over 1000 ft (m, fa, p/b), the VRM indication and depth scale may overlap one another, shift the cross-hair cursor slightly to show them completely. Further, when the display is shifted, the depth scale may obscure the time indication.

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Furuno 1933, 1943, 1833 manual Measuring Depth, Time, How to measure depth and time
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